\begin{table}[htbp]\centering
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\caption{Estimated Quarterly Effects on Event-Fundraising Proportions}
\begin{tabular}{l*{3}{c}}
\hline\hline
                &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}\\
                &\multicolumn{1}{c}{All Candidates}&\multicolumn{1}{c}{Incumbent Candidates}&\multicolumn{1}{c}{Non-Incumbent Candidates}\\
\hline
group(quatill\_ge\_date)=1&     0.00         &     0.00         &     0.00         \\
                &      (.)         &      (.)         &      (.)         \\
group(quatill\_ge\_date)=2&     7.46\sym{***}&     9.45\sym{***}&     5.89\sym{***}\\
                &   (0.41)         &   (0.71)         &   (0.49)         \\
group(quatill\_ge\_date)=3&     7.28\sym{***}&     9.03\sym{***}&     5.71\sym{***}\\
                &   (0.43)         &   (0.74)         &   (0.50)         \\
group(quatill\_ge\_date)=4&     2.73\sym{***}&     3.92\sym{***}&     1.37\sym{**} \\
                &   (0.45)         &   (0.78)         &   (0.54)         \\
group(quatill\_ge\_date)=5&    12.87\sym{***}&    16.95\sym{***}&     8.23\sym{***}\\
                &   (0.63)         &   (0.90)         &   (0.85)         \\
group(quatill\_ge\_date)=6&    13.46\sym{***}&    19.21\sym{***}&     5.40\sym{***}\\
                &   (0.77)         &   (1.06)         &   (1.12)         \\
group(quatill\_ge\_date)=7&    18.09\sym{***}&    23.05\sym{***}&     9.51\sym{***}\\
                &   (0.88)         &   (1.11)         &   (1.49)         \\
group(quatill\_ge\_date)=8&     7.94\sym{***}&    11.06\sym{***}&     3.29\sym{*}  \\
                &   (1.06)         &   (1.32)         &   (1.80)         \\
Constant        &    20.70\sym{***}&    24.74\sym{***}&    17.84\sym{***}\\
                &   (0.29)         &   (0.48)         &   (0.35)         \\
\hline
Observations    &    41965         &    18102         &    23831         \\
\hline\hline
\multicolumn{4}{l}{\footnotesize Standard errors in parentheses}\\
\multicolumn{4}{l}{\footnotesize \sym{*} \(p<0.10\), \sym{**} \(p<0.05\), \sym{***} \(p<0.01\)}\\
\end{tabular}
\end{table}
